Mean=total/the number of values =>total=mean*the number of values
the total of the first set of 8 numbers is : total=8*8=64
the total of the second set of 12 numbers is: 12m
the total of the 20 numbers is: 64+12m
the mean of the 20 number is: (64+12m)/20=5
solve for m: 64+12m=100
12m=36
m=3
4 (2x + 3) + 2 (x + 1) - 7
8x + 12 + 2x + 2 - 7
10x + 7
10x = -7
10x/10 = -7/10
x = -7/10
hope this helps
Answer:
20
Step-by-step explanation:
i think, dont trust me tho
Answer:
26.8907563 or if your rounding it then 26.7
Step-by-step explanation:
Answer:
Step-by-step explanation:
the number is 1300 if we have 40% from it will give us 520
